/Engine/Source/Runtime/Engine/Public/Rendering/MotionVectorSimulation.h
Previous simulated transforms are only valid for the frame on which they were added, and are removed on the next frame
An optional transform that is set if the specified component has a previous simulated transform, otherwise an empty optional.
[TOptional](API\Runtime\Core\IO\TOptional)< FTransform > GetPreviousTransform ( [USceneComponent](API\Runtime\Engine\Components\USceneComponent) * Component ) const